MMFS 1.58 Initial Release

Important: This build contains known bugs; use MMFS 1.59 instead

List of changes since MMFS 1.57:

• Add OSARGS3 support ( Setting EXT# of a file)
• Enable *DRENAME for MMFS2 B+ build
• Fix several bugs introduced in 1.57
• Utilities re-written to avoid using a page of workspace (this saves 256b in SWRAM builds)
• Many changes to save code space (so a fair chance of new bugs)

Full Changelog: mmfs_1_57_0...mmfs_1_58_0